1answer.
Ask question
Login Signup
Ask question
All categories
  • English
  • Mathematics
  • Social Studies
  • Business
  • History
  • Health
  • Geography
  • Biology
  • Physics
  • Chemistry
  • Computers and Technology
  • Arts
  • World Languages
  • Spanish
  • French
  • German
  • Advanced Placement (AP)
  • SAT
  • Medicine
  • Law
  • Engineering
AlladinOne [14]
3 years ago
5

A survey of several 8 to 9 year olds recorded the following amounts spent on a trip to the mall: $31.11,$25.01,$18.53,$14.37,$24

.16,$21.91 Construct the 80% confidence interval for the average amount spent by 8 to 9 year olds on a trip to the mall. Assume the population is approximately normal. Step 1 of 4 : Calculate the sample mean for the given sample data. Round your answer to two decimal places.
Mathematics
1 answer:
Alex17521 [72]3 years ago
8 0

Solution :

Amounts spent on a trip : $31.11, $25.01, $18.53, $14.37, $24.16, $21.91

Confidence interval = 80%

Average amount spent = 8 to 9 years old

One sample T confidence interval

μ : Mean of variance

80% of confidence interval results :

Using statistical software,

Variable : data

Sample mean : 22.515

Std. Err. = 2.3479945

DF = 5

L. limit : 19.049632

U. Limit : 25.980368

SD = 5.75

Critical value = 1.476

You might be interested in
Nathan opens a new savings account and makes an initial deposit of $400.
AfilCa [17]

Answer:

The answer to the first one is 6

Step-by-step explanation:

If the time frame given is 9 months, then we can find that 9 months is 3/4 of a year. 3/4 x 2% = 0.015.     0.015 x 400 = 6. He would have made 6 dollars in 9 months.

Answer the the second one:

4.5% x 5 (years) = 0.225.     0.225 x 10,000 = 2,250. Since this is a car loan and not a bank interest for example, we add it to the total cost. I'm pretty sure its the third one.

6 0
3 years ago
the ratio of the angle measures of a triangle are 3:3:4 what angle measures the triangles classification ​
TEA [102]

Step-by-step explanation:

sum of the ratio=3+3+4=10

now,

angle I = 3/10×180=54

angle II= 3/10×180=54

angle III=4/10×180=72

that shows th given triangle is isoceles

6 0
3 years ago
Plz help!!! 40 points. The graph of a line relates the volume as measured in gallons with its approximate equivalent volume meas
Iteru [2.4K]

Ahh i hope im in time to help!

The answer is C, 46

Hope this helped pls mark be brainliest!!!

7 0
3 years ago
This is the graph of y = sin(x). Does anyone know the second part?
Alborosie

Answer:

The resulting graph is y = 5\cdot \sin x.

Step-by-step explanation:

The resulting function is of the form:

y = A\cdot \sin x + k

Where:

x - Independent variable, dimensionless.

y - Dependent variable, dimensionless.

A - Amplitude, dimensionless.

k - Midpoint value, dimensionless.

The sine function is bounded, between -1 and 1, and must be multiplied by a stretch factor. That is: A > 0. According to the graph, the function is bounded between 5 (y_{max}) and -5 (y_{min}), and the midpoint value (k) is 0. The amplitude is determined by the following calculation:

A = \frac{y_{max}-y_{min}}{2}

If y_{min} = -5 and y_{max} = 5, then:

A = 5

The resulting graph is y = 5\cdot \sin x.

6 0
3 years ago
Factor completely help plz
satela [25.4K]

Answer:

the answer of this question is given in above picture, look

6 0
3 years ago
Other questions:
  • during the week, the Toronto stock exchange made the following gains and losses. Monday -150, Tuesday +106, Wednesday -47, Thurs
    12·1 answer
  • PLS HELPPP!!!!!! <br><br>just to be clear c is not correct ​
    11·1 answer
  • F(×)=log [x+4/×-1] find the domain
    13·1 answer
  • Input<br> 3<br> 5<br> 8<br> output<br> 8<br> 10<br> 13
    9·1 answer
  • What is the area of this figure?<br><br><br><br> Enter your answer in the box.
    12·2 answers
  • What are the answers to these??
    8·1 answer
  • What is the simplest radical form with a rational denominator of 4.898?​
    10·1 answer
  • 4) The mass of a chest is 498 kg when it is 1/2 filled with treasure.
    6·2 answers
  • Which of the following set of ordered pair is a function? A {(9,0), (9, 1), (9,2), (9,3)} B [(-1,0), (-2, 0), (2,0), (1,0)} C {(
    11·1 answer
  • ANSWER PLEASEEEEEEEEEEEEEEEEEEEEEEEEEEEEEE
    7·2 answers
Add answer
Login
Not registered? Fast signup
Signup
Login Signup
Ask question!